Classification
000 - Computer science, information & general works
1
140 - Specific philosophical schools
300 - Social sciences
1
320 - Political science
330 - Economics
333 - Economics of land & energy
1
370 - Education
1
600 - Technology
620 - Engineering & allied operations
1
630 - Agriculture & related technologies
1
700 - The arts; fine & decorative arts
900 - History & geography